KR20170072370A - Glued composite plastic part, method for the production thereof, and part made therefrom - Google Patents

Abstract

The invention relates to a plastic part (1) having a rib structure (2) and a support (1) having a profile which is bonded to the rib and whose longitudinal edge is arranged vertically or nearly vertically on the plastic substrate (4). ≪ / RTI > The present invention also relates to a method for producing such a composite part and to a final product comprising such a composite part as a component.

Description

TECHNICAL FIELD [0001] The present invention relates to a bonded plastic composite part, a method of manufacturing the same, and a part made from the composite plastic part,

The present invention relates to a composite plastic structural element comprising a plastic structural element comprising a rib structure and a support profile (s) which is glued to said rib and whose narrow side lies above said plastic substrate body. The invention also relates to a method of making such a composite structural element and to a finished part comprising such a composite structural element as a component.

A method of making composite structural elements comprising metal structural elements and plastic structures is known from DE-A 101 49 633, wherein at least one perforated rim or at least one surface with a perforated collar Metal structural elements, and plastic structures are compressed together with the aid of one or more engagement tools, such that the perforated rim / collar penetrates into or through the plastic structure in a positively and non-actively locking manner.

Known composite structural elements or semi-finished products are for example made of a layered composite wherein, for example, two metal sheets are combined with the aid of an intermediate plastic material or a plastic foam to form a sandwich structure (EP 489 320 A1, EP 285 974 A1 and EP 547 664 A2). In addition, there is a method for producing a composite sheet having a metal sheet on the outside and a rib structure on the inside (see EP 775 573 A2). In addition, there is a method of bonding metal sheets by a combination of in-tool compression and injection molding (EP 721 831 A1). Furthermore, plastic / metal composite structural elements in which the metal sheet is supported by a rib structure are also known (EP 370 342 A2). EP 1 235 675 A1 describes composite plastic structural elements in which two flat work pieces of different materials are joined together by a plastic material integrally molded in their edge regions.

In the foregoing prior art, metallic structural elements, which in most cases are metal sheets, must be bonded to the plastic material in an active locking manner in a discontinuous manner or over a wider area, thereby ensuring a maximum stiffness of the system as a whole. To this end, even in the case of adhesive bonding or welding, the structural elements are bonded together as rigidly as possible, so as to avoid flexibility in the joint and to obtain maximum load transfer of the two material pairs by means of a rigid connection as possible. This process is disadvantageous under the action of heat, because in most cases materials having different coefficients of thermal expansion are connected and this results in a distortion of the composite as a whole. As a result, internal stresses occur and result in deterioration of the properties of the plastic structural elements, which may indicate, for example, stress cracking and / or weakness of the overall structural element. Methods referred to as contrary to the effect of this distortion are described in WO 1997/003855, EP 1 174 299 A2 and US-A 4,881,773.

US 703 7 568 B1 describes a coupling element which performs the function of coupling a foil envelope, for example aluminum, to the supporting rib structure. One side of the engaging element being adhesively bonded to the shell by it; On the opposite side, one side of the rib is serially glued in the engaging element. The rib structure described herein serves as a support substrate for the sheath to which it is bonded via the third element-engagement element. The material of the individual elements is selected so that no different thermal expansion occurs. An important element of the disclosed structural elements is also that the ribs are located in each case on both the top surface and the bottom surface thereof in the coupling element, which in turn bonds it to the surrounding envelope. In this way, it is possible to perform an effective supporting function.

DE 19842456 A1 describes a method of preventing sink marks on the visible side of (wide-area) plastic structural elements. This is done by a rib applied by two-component injection molding. No connection with the support profile is provided.

EP 1 488 958 A1 describes a method for combining plastic elements with structural elements of metals for decorative purposes. However, as disclosed in the present invention, the use of a metal part as a support profile is not described.

Movable open roof systems are further reinforced to meet rigidity or strength requirements, whether they are made of glass or made of plastic material. In the case of a known sliding glass roof, a metal sheet having a wide-area profile is adhesively bonded under the sliding roof. The metal sheet with this profile is pre-fabricated by compression and / or deep-drawing. If the roof system is transparent, the area to be viewed from the metal sheet must then be cut. This produces a large amount of waste. To reinforce the sliding roof system, the metal sheet with the profile has a shape in which a cavity is formed to increase the geometric moment of inertia. Due to the large area of the sheet metal body used, the system is heavy.

It is an object of the present invention to provide a plastic composite material in which stress or load peaks do not occur in plastic structural elements during its manufacture or use. The occurrence of internal stresses, which can lead to distortion of the structural elements and / or destruction of the material, should be prevented so that plastic materials which are amenable to amorphous thermoplastics and stress cracking can also be used. The reinforced composite plastic structural element should have as low a weight as possible, and as a result of the efficient use of the material, the manufacturing cost should be as low as possible using a simple method. At the same time, especially for the "A" surface, the reinforcing structure should not cause visible defects on plastic structural elements, such as may occur in the case of sheet metal inserts in injection molding.

The plastic composite reinforced by the novel method should be suitable for use in automotive glazing, particularly for large panoramic roofing systems or mobile open roof systems with the above-mentioned properties.

It is a further object of the present invention to provide a method of making reinforced plastic composites in a novel manner.

Surprisingly, it has been possible with the present invention to achieve this purpose by preventing the local stress peak by combining the specific geometric shape of the reinforcing structure and the use of a structural adhesive to the compensating layer to isolate the plastic material from the metal.

The present invention relates to a plastic structural element (K) comprising a flat plastic substrate body (G), and further comprising at least one rib or at least one pair of ribs on at least one side thereof, In such a manner that the narrow side of the support profile is located above the plastic substrate body or at a slight distance above the plastic substrate body by means of an adhesive technique with respect to at least one profile side of the support profile S, And a rib structure (R) provided thereon.

The present invention also provides a method of making such a composite structural element, as well as a finished part comprising such a composite structural element as a component.

Within the scope of the present invention, "located on a plastic substrate body" means that the narrow side of the profile is parallel to the surface of the plastic substrate body, either directly on it, or at some distance from the substrate body , As shown in Figure 4a (directly above it) and Figure 4b (with some distance) for example to use an I-shaped profile.

Within the scope of the present invention, a pair of ribs consists of two ribs running parallel to each other, and the ribs can travel parallel to each other or at different distances from each other. Within the scope of the present invention, the ribs of the rib package, consisting of one or more ribs, are also the same. The associated ribs of the pair of ribs may have the same or different heights, such as all the ribs of the rib structure R. When the rib structure R comprises a plurality of rib packages, the number and arrangement of the rib packages depends on the degree and nature of the requirements that the finished part is expected to be manufactured from and on the properties of the support profile to be adhered therein Is advantageously determined by height. In a particularly preferred embodiment, the rib packets are arranged such that the load on the reinforcing structure as a whole is distributed, and the adhesive is preferably loaded over a length as long as possible by shearing.

In a preferred embodiment, two or more ribs are arranged parallel to each other, and in another preferred embodiment, two or more ribs are partially concave or convex with respect to each other.

In a further preferred embodiment, the ribs have additional inductors or retaining elements to simplify the mounting of the inductor or support ribs and / or the support profile (S).

The base body G and the rib structure R of the plastic structural element K are preferably manufactured by an injection molding process or an extrusion process and can be made of the same material or different materials. A suitable material is thermoplastics. Polyesters such as polyamide (PA), polyesters, especially polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyacrylates, especially polymethylmethacrylate (PMMA), polybutylene terephthalate (PS), syndiotactic polystyrene, acrylonitrile-butadiene-styrene (ABS), polyolefins, especially polypropylene (PP), polyethylene (PE), polycarbonate (PC), copolycarbonate (CoPC) Reinforced and / or filled plastics based on polyesters, copolyester carbonates, or mixtures of these plastic materials are particularly suitable. In a preferred embodiment, the plastic material is an amorphous thermoplastic, in particular a polycarbonate, a copolycarbonate, a copolyestercarbonate, a PC blend and polymethylmethacrylate.

The plastic structural element K is in particular a fixedly glued or otherwise mobile roofing module, for example a panoramic roof having a width b, preferably a surface area of 0.5 m ² to 1.5 m ² 4a). For roof modules, width b is at least 0.2 m, preferably more than 0.4 m. Such roof modules are preferably produced by an injection molding process. A similar system with a surface area of more than 0.5 m ² , preferably more than 1 m ² , can also be used for architectural glazing. Such glazing is preferably produced by extrusion.

The support profile S inserted into the rib structure can be one part or a plurality of parts. It can be hollow, manufactured with cavities, channels, and so on. In the simplest and preferred embodiment, the support profile is an I-shaped profile, an L-shaped profile or a T-shaped profile. Also U-shaped profiles are possible, which for example combine pairs of ribs as well. It may be a closed profile, for example a rectangular tube. In this case, the geometries of the narrow face and the wide face may be the same (see FIG. 7). In a suitable geometric form, the support profile may include, for example, one or more channels that can be used to house cables and hoses or to transport fluids or gases.

In Figure 4a, the dimensions of the composite structural element are shown in an exemplary embodiment. The reference numerals and characters used have the following meanings:

1 Plastic base body (G)

Two ribs, a portion (R) of the rib structure,

3 adhesive layer

4 Support profile (S)

h _s height of support profile

h _R Rib height

S _w Side of the profile away from the plastic substrate body

S _R The side of the support profile facing the plastic substrate body

b The width of the plastic base body

The support profile can coincide with the ribs in the geometry of the surface so that the inserted profile has the same height as the rib height (Figs. 4A, h _R ) (Fig. 4A, h _S ). However, it may be lower or higher than the ribs, so that they may protrude beyond the rib or rib package. The height h _S of the support profile S is not more than twice the height h _R of the ribs; In another embodiment, this is exactly one time the height of the ribs. The geometry of the support profile may allow it to perform additional functions such as, for example, fastening elements. In this case, the support profile is a semi-product having properties that go beyond simple reinforcement functions. The support profile may also be arranged so that a non-positively and / or positively locking connection with at least one additional structural element extends across the structure of the support profile.

The ratio of the height of the ribs h _{R to} the width b of the plastic substrate main body G is generally at least 1:10, preferably 1:15, particularly preferably 1:30.

According to the present invention, at least one broad side of the support profile is adhesively bonded to the ribs. The narrow side (S _w ) of the profile away from the plastic substrate body is buried in the rib or free. The narrow side (S _R ) of the support profile facing the plastic substrate body may be located above the substrate body G or at a slight distance h _R therefrom, and the distance may be less than 0.5 times the height of the rib have. The two embodiments are shown in Figure 4a (directly above) and Figure 4b (with some distance) as an example for an I-shape profile. According to the present invention, the support profile S is bonded to exactly one of the above-described plastic structural elements K (including the plastic substrate main body G with width b and the rib structure R). Thus, the wide side of the profile and the side of the plastic substrate body are perpendicular or substantially perpendicular to each other (angle of about 70 to 110 degrees).

The support profile S may be made of a metal, fiber-reinforced or ceramic material. This can be produced by extrusion, compression, dip-drawing, roll forming or other molding processes.

The support profile is preferably made from a metal material. In a particularly preferred embodiment, the support profile is a simple reinforcement profile made from sheet metal, preferably from steel, iron, titanium, aluminum or magnesium, or an alloy of these metals. In a particularly preferred embodiment, the support profile is a rolled steel piece or an extruded aluminum profile.

In another embodiment, the profile may also consist of a ceramic, a durometer, or a plastic composite.

Structural adhesives used for adhesive bonding can be, for example, commercial adhesives such as those used in the automotive industry for adhesive bonding of window screens or sheet metal structures. It is possible to use wet adhesives, contact adhesives, hot-melt adhesives or reactive adhesives. 1- or 2-component polyurethane-based structural adhesives of different hardness are particularly suitable in the art. However, it is also possible to use, for example, an adhesive based on acrylic / acrylate, methyl methacrylate, silicone or epoxy resin. In the rib packet, the adhesive layer may have a thickness of several millimeters or less. The minimum thickness of the adhesive layer is dictated by the requirements needed in terms of the flexibility of the adhesive layer and therefore the material and geometry of the composite structural element as well as the requirements in the composite structural element. The thickness of the adhesive layer can be controlled by a different space between the two ribs bonded to the support profile by adhesive technology so that the nature and degree of rigidity and adiabation can be adjusted in a flexible manner. The adhesive may also be a hot-melt adhesive that is thermoplastically processable. In this case, it is possible to combine the plastic material, the hot-melt adhesive and the support profile into a multi-component injection molding operation on the composite structural element.

The thickness of the adhesive layer depends on the expected load. It is only indirectly dependent on or independent of the dimensions of the structural element.

In a preferred embodiment, the adhesive layer is 0.5 to 10 mm thick, and in a particularly preferred embodiment is 1 to 5 mm thick.

The adhesive, or resilient adhesive material, may optionally and additionally enter into the actively locking connection. In the case of relatively small relative movements between the composite structural elements, the adhesive functions as an adhesive and an insulating element. High loads are delivered by the adhesive surface over a large area, uncorrected, and stress peaks and their associated disadvantages do not appear in the structural elements.

The present invention also relates to a method of producing a plastic structural element comprising a substrate body and a rib structure comprising at least one rib or at least one pair of ribs by a 1-, 2- or multi-component injection molding or extrusion process, Also provided is a method of manufacturing the composite plastic structural element, wherein at least one side of the support profile is bonded to at least one rib surface by adhesive technology. When the support profile is bonded to two adjacent ribs, it is first inserted between the ribs and then bonded. It is equally possible to first compress the adhesive between the ribs and then insert the support profile.

Another possible method of producing such a composite plastic structural element is a multi-component injection molding process wherein the support profile is already located in the mold and the plastic material and the thermoplastic elastomer serving as the adhesive are injected.

The composite structural element according to the invention has the advantage that very little is required of the geometry of the support profile. A simple reinforcing sheet can be inserted, and the tolerance deviation can be compensated by the thickness of the adhesive layer. Due to the simple geometry, there is no wasted material, and due to the support profile and the vertical alignment of the major surface of the substrate body, less support profile is needed. This on the one hand means lower cost of materials due to lower material cost and lower manufacturing cost for the support profile, and on the other hand, weight reduction of the final part. With the aid of the adhesive layer, the generated stress is distributed uniformly over the large area over the plastic material, so that stress peaks do not occur. The new technology thus also makes it possible for the structural elements to be made of amorphous thermoplastics which will be reinforced with a metal profile. The nature and degree of reinforcement and insulation can be adjusted in a very flexible manner by the geometry of the ribs and the thickness of the adhesive layer. Vibration and noise are suppressed by the braking properties of the adhesive layer.

The reinforced plastic structural elements according to the invention can be used, for example, as components of structural or structural elements in automobiles, aircraft, railways or shipbuilding or in the manufacture of household goods, household appliances or electrical devices. Applications include roof glazing and car glazing, especially roof modules such as panoramic roofs. Additional possible applications are plastic structural elements for automotive side panels, car seat covers and furniture such as, for example, chairs and tables.

In a preferred embodiment, composite plastic structural elements are used in the manufacture of automotive glazing, especially large panoramic roofs or movable open roof systems.

For the production of automotive glazing, the support profile preferably has a wall thickness of 0.5 to 5 mm, particularly preferably 0.8 to 3 mm.

The system described herein can contribute to reducing the weight of the roof system.

In one embodiment, the structural elements according to the present invention made by a two-component injection molding process can be made, for example, of a transparent component made of a transparent plastic material, such as polycarbonate, and an additional component such as, for example, a PC blend It consists of a second component made of a plastic material and includes pairs of ribs integrally molded in the area to be reinforced. Pairs of ribs can use all available vertical space. Following the injection molding process, the structural elements are coated with a lacquer system in most cases. Conventional lacquer systems are cured under the action of heat. After or after lacering, the support profile is inserted between pairs of ribs of the substrate body and held in place by the support ribs located between the ribs. In standard adhesive bonding processes such as those used for adhesive bonding of automotive window screens or bodywork structural elements, the support profile can now be adhesively bonded to the substrate body. Thereafter, using the hole already located in the support profile, mounting of the sliding exercise device can be carried out. In this type of process, the load passes into the support profile but does not pass into the thermoplastic substrate body.

By virtue of the lower weight of the support profile located vertically on the roof surface, a weight reduction of less than about 50% of the reinforcement can be obtained compared to the conventional reinforcing metal sheets placed in parallel by conventional methods.

The system according to the invention is particularly flexible under the action of heat. When the thermoplastic base body expands, a tightly coupled reinforcement system will result in distortion of the group of components. The very thick adhesive used herein allows relative movement between the substrate body and the reinforcing profile and reduces warpage. Due to the vertical position of the support profile, the long length of adhesive bonding and the favorable load transfer under shear, the system nevertheless has a high overall stiffness. Stiffness can be further tailored by adjusting the adhesive thickness and adhesive hardness.

By the method according to the invention it is possible to produce composite parts which do not exhibit surface bonding, which is particularly important for the "Class A" requirement.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are intended to further illustrate the present invention by way of example and are not intended to limit the invention to these embodiments. In the drawing:
1 shows an isometric sectional view of a composite structural element with a substrate body 1 produced by thermoplastic injection molding. Two parallel ribs 2 are formed integrally with the base body 1 in a vertical direction. A support profile 4 is inserted between the two ribs 2 to engage the ribs 2 with the structural adhesive 3. In this embodiment, the ribs 2 each have the same height. The support profile 4 in the form of an I-shaped profile protrudes between the ribs 2 with a greater height.
2 shows a top plan view of a section of a composite structural element; The form shown here is different from that of Fig. 1 in that the ribs 2 do not run parallel to each other. In this embodiment, the ribs 2 proceed convexly with respect to each other, such that the structural adhesive 3 has a thicker region in the middle.
Figure 3 shows a top view of a section of a composite structural element; The form shown here is different from that of Fig. 1 in that the ribs 2 do not run parallel to each other. In this embodiment, the ribs 2 are recessed relative to one another so that the structural adhesive 3 has a thinner region in the middle.
Figure 4a: a cross section of the composite structural element of Figure 1; Of particular note here are the different heights of the ribs 2 and the support profile 4, which profile is in the form of an I-shaped profile in this variant.
Figure 4b: a composite structural element similar to Figure 4a, but where the I-shaped profile is located at some distance from the plastic substrate body.
5: section of a composite structural element similar to Fig. In this variant, both the support profile 4 and the rib 2 have the same height.
Figure 6: Cross section of a composite structural element. In this variant, for the purpose of reinforcement, the support profile 4 in the form of a T-shaped profile was glued to the rib 2 using a structural adhesive 3.
Figure 7: Cross section of a composite structural element. In this variant, a hollow profile with a rectangular cross section was used as the support profile 4. Channels close to the sides can be used to house cables and hoses or to transport media, such as gases or fluids.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will now be described in further detail by way of further exemplary embodiments with reference to the manufacture of a roof module according to the invention from the composite structural elements according to the invention.

In the present exemplary embodiment, the structural element according to the present invention produced by a two-component injection molding process comprises a transparent component containing a transparent plastic material, in this embodiment polycarbonate. The second component comprises another plastic material, in this embodiment a polycarbonate blend. The two-component injection molding described herein is carried out in a suitable injection molding machine equipped with a turning plate mechanism.

In the first operation step, to form suitable for processing by injection-molding polycarbonate, for example, mark rolron (Makrolon) ^® AG 2677 into a sheet having a size of 600 mm x 800 mm by injection compression molding process, A structural element with low internal stress is produced. After injection molding of the first component having a wall thickness of 5 mm, the device is opened and rotated. The film injection molded first component remains in the cavity of the turning plate and is therefore also rotated. In a further step, additional thermoplastics material is injection molded onto the first component using a second injection molding unit on the opposite side. The plastic material of the second component has a black color and the PC / ABS blend, for example, made of a blend bay (Bayblend) ^® T95MF. The second component is not injected onto the entirety of the first component but merely surrounds it, leaving a transparent beveled area in the middle. A sheet of transparent polycarbonate and a peripheral second component having a width of 200 mm and a thickness of 2.5 mm together constitute the base body G. [ The rib structure R is formed into a second black component in the same injection molding step.

The ribs have an advantageous thickness ratio to the substrate body G (second component) to prevent sink marks on the opposite surface. The rib has a thickness of about 2 mm at the end of the rib and has a height of 15 mm. In this exemplary embodiment, ribs are produced which run parallel to each other as shown in Fig.

The pairs of ribs proceed both forward and backward, as well as left and right, on the outer surface of the roof. In this exemplary embodiment, the pairs of ribs are arranged at right angles to each other, but are not joined together. In another exemplary embodiment, the pairs of ribs may be joined together in a corner region. In this exemplary embodiment, it is also possible to use four separate support profiles and, if the ribs are conformed to one another, to use only one support profile that is introduced to the periphery between the ribs.

The inserted support profile functions mainly to reinforce the roof in the front and rear regions. On the left and right side in the side regions, a roof-guiding exercise device is mounted on the support profile, which, for that purpose, represents a suitable hole and clearance to create a connection with the roof periphery. The mounting of the sliding exercise device can then be carried out by means of a hole previously provided in the support profile. In this type of process, the load is passed into the support profile and not through the thermoplastic substrate body.

The space of the rib (Figure 1, Figure 3) is given by the thickness of the support profile (Figure 1, Figure 4) and the adhesive (Figure 1, Figure 2) located between the ribs. For mobile roof covers - the thickness of the support profile, here an I-shaped profile made of steel sheet, is here 1.5 mm and has a thickness of 3 mm on both sides. The thickness of the adhesive and support profile imparts a rib space of 7.5 mm relative to the inner surface of the rib. At right angles to the ribs, a small support rib is formed by injection molding. These are perpendicular to the ribs and are directed into the spaces between the ribs of the pairs of ribs. The height of the support rib has a wall thickness of 0.5 mm and is about 1/3 of the rib height. The support ribs serve to position the support profile at the time of mounting when the adhesive has not yet been introduced between the ribs.

Following the injection molding process, the structural elements are coated with a lacquer system to increase scratch resistance and UV resistance of the surface. The space between the ribs remains lacquer-free. Conventional lacquer systems are cured under the action of heat. After laminating the support profile, a piece of steel having a wall thickness of 1.5 mm is inserted between the pairs of support ribs of the base body and secured between the pairs of support ribs. The support profile can then be adhesively bonded to the ribs by a standard adhesive bonding process such as that used to bond the vehicle window screen or the vehicle structural component. In this exemplary embodiment, the support profile is positioned between the pairs of ribs and held in place by the support ribs, and a two-component polyurethane adhesive is introduced into the space remaining between the ribs and the support profile. In another exemplary embodiment, the adhesive may be first introduced between a pair of ribs. The support profile is then compressed between the ribs.

The automotive roof module according to the present invention has a significantly reduced weight compared to a roof module with standard reinforcement.

Claims (16)

A method of manufacturing a composite plastic structural element comprising a plastic structural element (K)
The plastic structural element (K)
A flat plastic substrate body (G) and, furthermore, on at least one side thereof, at least one rib or at least one pair of ribs, and at least one rib surface, By means of an adhesive layer having a thickness of from 0.5 to 10 mm on at least one profiled surface, the narrow side of said support profile being located above said plastic substrate body or at a slight distance above said plastic substrate body And a rib structure R,
And at least one plastic material selected from the group consisting of polycarbonate, copolycarbonate, copolyester carbonate, PC blend and polymethyl methacrylate,
An automotive roof module having a surface area of 0.5 m ² to 1.5 m ² , or a building glazing having a surface area of more than 0.5 m ² ,
Characterized in that the plastic substrate body and the rib structure are produced by 1-, 2- or multi-component injection molding or are produced by extrusion. 2. The method of claim 1, wherein the entire composite plastic structural element is produced by a multi-component injection molding process, and the support profile is placed in the mold. A flat plastic substrate body (G) and, furthermore, on at least one side thereof, at least one rib or at least one pair of ribs, and at least one rib surface, By means of an adhesive elastomer layer having a thickness of from 0.5 to 10 mm on at least one profile side, the narrow side of the support profile being located above the plastic substrate body or with a slight distance above the plastic substrate body And a plastic structural element (K) comprising a rib structure (R)
And at least one plastic material selected from the group consisting of polycarbonate, copolycarbonate, copolyester carbonate, PC blend and polymethyl methacrylate,
An automobile roof module having a surface area of 0.5 m ² to 1.5 m ² , or a building glazing having a surface area of more than 0.5 m ² . 4. Composite plastic structural element according to claim 3, characterized in that the support profile (S) is a part or a plurality of parts and is exactly connected to one plastic structural element (K). The composite plastic structural element according to claim 3 or 4, wherein the ratio of the height of the rib structure to the width (b) of the plastic base body (G) is at least 1:10. The composite plastic structural element according to claim 5, wherein the ratio of the height of the rib structure to the width (b) of the plastic substrate body (G) is at least 1:15. 7. Composite plastic structural element according to claim 6, characterized in that the ratio of the height of the rib structure to the width (b) of the plastic base body (G) is at least 1:30. The composite plastic structural element according to claim 3 or 4, characterized in that the adhesive is an adhesive based on polyurethane, acrylate, epoxide or silicone. 5. Composite plastic structural element according to claim 3 or 4, characterized in that the support profile is a metal sheet made of steel, iron, titanium, aluminum, magnesium or an alloy containing at least one of these metals. 5. Composite plastic structural element according to claim 3 or 4, characterized in that the plastic structural element is made of amorphous thermoplastics. 11. The method of claim 10, wherein the plastic structural element comprises at least one plastic material selected from the group consisting of polycarbonate, copolycarbonate, copolyestercarbonate, PC blend, and polymethylmethacrylate Features a composite plastic structural element. 5. Composite plastic structural element according to claim 3 or 4, characterized in that an additional support and a retaining element are attached to the pair of ribs or ribs. 5. Composite plastic structural element according to claim 3 or 4, characterized in that the support profile is a semi-product having properties that extend beyond the reinforcing function. 5. Composite plastic structural element according to claim 3 or 4, characterized in that said support profile is capable of further performing a fastening function. 4. A glazing of a motor vehicle or building comprising at least one composite plastic structural element according to claim 3 or 4 as a structural element component. 16. Vehicle or building glazing according to claim 15, characterized in that it is an automotive roof module.

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